The 2017–18 Atlantic Coast Conference men's basketball season began with practices in October 2017, followed by the start of the 2017–18 NCAA Division I men's basketball season in November. Conference play started in late December 2017 and concluded in March with the 2018 ACC men's basketball tournament at the Barclays Center in Brooklyn, New York. The Virginia Cavaliers won an outright regular season championship, their third in five years under the guidance of Tony Bennett, who also received his third ACC Coach of the Year Award. He also became the only living three-time winner of the Henry Iba Award for national coach of the year.